Widest size tire for stock wheels?
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Have an '89 944 that will be getting run in ES, SCCA Solo....
What's the biggest size R-compound that people are running on the phone dials?
What's the biggest size R-compound that people are running on the phone dials?
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AP1 S2000s have slightly smaller wheels (16" x 6.5" F, 16" x 7.5" R compared to the 944's 16" x 7" F, 16" x 8" R), but can still fit 245s in front and 275s in back, so at least those sizes would fit on a 944.
Whether you want to run those sizes is another story. When I ran a 968, I ran 245 F / 275 R, but if I did it again, I would try a square setup (245 or 275 all around). I had a giant front bar, though, so a staggered setup might be best with a smaller or stock front bar.
Whether you want to run those sizes is another story. When I ran a 968, I ran 245 F / 275 R, but if I did it again, I would try a square setup (245 or 275 all around). I had a giant front bar, though, so a staggered setup might be best with a smaller or stock front bar.
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I THINK I can do a 245 on a square setup... the phone dials are 15x7, so I have a junk 245 hoosier coming to check how bad they will be pinched on the wheel... Makes me wanna just say eff it and step up to ST* or street prepared with the thing...
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I must have been thinking of some other phone dials. :P
Hoosiers are meant to be stretched over skinny wheels. D Stock Integra Type Rs sometimes run 275s on the stock 15" x 6" rims, so 275s should definitely fit on your rims as well. Whether they'll fit in your fenders is a different question.
Hoosiers are meant to be stretched over skinny wheels. D Stock Integra Type Rs sometimes run 275s on the stock 15" x 6" rims, so 275s should definitely fit on your rims as well. Whether they'll fit in your fenders is a different question.
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Reviving an old post here rather than starting a new one. I am wondering what the widest street tire I can fit on my stock 18x7.5" Boxster S wheels. TireRack says only a 225 since its tread would be 8.4" wide, almost an inch wider than the 7.5" rim.
I know that street tires have a softer sidewall than R-compound race tires do, so pinching a wide, street "140+ rating" tire would not have the same benefit. What do you think would be the best size tire for these aforementioned wheels?
I know that street tires have a softer sidewall than R-compound race tires do, so pinching a wide, street "140+ rating" tire would not have the same benefit. What do you think would be the best size tire for these aforementioned wheels?
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At somepoint the issue might be how willing someone is to mount an "extra" wide tire on too narrow a rim. imho, AX#73, a 1.3" difference doesn't seem like much at all.
As to the OP, ltdan, I've been thinking about running EStock as well.. I'd recommend a 205 width for you
As to the OP, ltdan, I've been thinking about running EStock as well.. I'd recommend a 205 width for you
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I am trying to determine the widest tire I can get on my 1998 Boxster on the OEm 16" wheels for autoX. I have gone through all 19 pages of threads and find many threads related to my question, but none for my year and wheel size.
Can I fit a 225/50ZR-16 on the front? What would be the down side to running that size on all four corners?
Can I fit a 225/50ZR-16 on the front? What would be the down side to running that size on all four corners?
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A 98 boxster came with 6 and 8 x 16 wheels iirc. 225 would be pinched on a 6" rim. 205 is a more natural fit.
Considering Boxsters also came with 7" front and 8.5" rims, you might consider locating a set of 17's for use. Prices tend to be in the $400-600 range for a set of rims. 17" rims also allow for more tire selections,
I know several folks who ran a square set up (245s in most cases) without issue. Running 225s would likely be ok as well. It would certainly help dial out some of the inherant understeer.
Considering Boxsters also came with 7" front and 8.5" rims, you might consider locating a set of 17's for use. Prices tend to be in the $400-600 range for a set of rims. 17" rims also allow for more tire selections,
I know several folks who ran a square set up (245s in most cases) without issue. Running 225s would likely be ok as well. It would certainly help dial out some of the inherant understeer.
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I did some research and heard from a guy that saw firsthand a late NA 944 with factory clubsport wheels and option code, so that's what I ran on my car.
I had 225 width BFG R1s on the fronts and 245s in the rear on my phone dials, and when I shifted over to the clubsports (which are 9" wide rears IIRC) the 245s were almost too small. You could probably fit a 285 on that thing.
225 and 245 was a good-handling setup on phonies, but I think 245 square would be better strictly for autocross. I did rub a bit at full lock though.
I had 225 width BFG R1s on the fronts and 245s in the rear on my phone dials, and when I shifted over to the clubsports (which are 9" wide rears IIRC) the 245s were almost too small. You could probably fit a 285 on that thing.
225 and 245 was a good-handling setup on phonies, but I think 245 square would be better strictly for autocross. I did rub a bit at full lock though.
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I'd re-read the scca rulebook about what constitutes a "stock" wheel. Clubsports were not available on the base 944 and scca might not allow them. 7x15s were the standard wheel with either 7/8 x15 or 7/8x16s an option on the base 944.
A square set up allows you to maximize tire life. A staggered set up may or may not be quicker.
A square set up allows you to maximize tire life. A staggered set up may or may not be quicker.